2003 Mitsubishi Lancer Logo
Nicole Moore Posted on Jun 22, 2012

I have an 2003 Lancer ES with a rough idle. It sometimes shuts off.

I have cleaned the intake air control valve and it still is acting up. What should be my next step?

1 Answer

Anonymous

Level 1:

An expert who has achieved level 1.

New Friend:

An expert that has 1 follower.

  • Contributor 1 Answer
  • Posted on Jun 27, 2012
Anonymous
Contributor
Level 1:

An expert who has achieved level 1.

New Friend:

An expert that has 1 follower.

Joined: Jun 27, 2012
Answers
1
Questions
0
Helped
4099
Points
1

If you want this fixed seriously because mine was doing the same thing and people kept getting me to buy all this **** i didnt need for my 03 lancer es and all i did was unplugged the MAF (mass air flow sensor) and it was perfect all over again. I was pretty upset figering this out yesterday. Just unplug it and turn your car over and let it idle a min. If all symptoms go away buy a new MAF sensor from a parts dealer for like a buck eighty.

5 Related Answers

Mustgo

Vincent G

  • 2363 Answers
  • Posted on Dec 19, 2009

SOURCE: 2003 Lancer rough ildle

Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

===
clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE
===

Also remove carbon built up behind the EGR valve and the EGR passage tube.

===

Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.

===

EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.


Take it for a test drive.


Please rate my answer if it's useful to you.


Cheers,

Mustgo

Ad

Anonymous

  • 2187 Answers
  • Posted on Jun 13, 2009

SOURCE: 2000 mistubishi galant es idling rough seriously

Idling problems may be cause buy a number of issues.  You may check out the fast idle control valve and PCV if they would need cleaning.  You can check out the timing it may be advanced, that is why you feel that the car runs hard.

Anonymous

  • 62 Answers
  • Posted on Jul 29, 2009

SOURCE: 1999 mitsubushi eclipse shows p1390 engine code

have you had a recent timming belt if so get it re timmed

Anonymous

  • 151 Answers
  • Posted on Feb 28, 2010

SOURCE: will the evo x parts fit a 2002 lancer es and can

Try this web site for info on Mits Galants http://www.thegalantcenter.net/forum.php

Anonymous

  • 36 Answers
  • Posted on Jul 11, 2010

SOURCE: A/C unit blowing hot air when selected to cool on

Your A/C unit is low on Freon, or you have a bad pressure switch. Turn on the Air Conditioner, with the engine running, & put it on Max. Open the hood, & see if the compressor is spinning. If it is not, then you need gas. You can buy refill kits at a local Walmart. If you have a leak, it may be a wasted $30. That is what I paid for a 22 oz. can of R-134A Freon. I had a dealer regas mine & put in a dye that they can find leaks with a black light. It may be cheaper in the long run. My drier, in front of the radiator has a leak. It will cost $460. to replace it.

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
2answers

DOES ANYONE KNOW WHERE THE IDLE AIR CONTROL VALVE IS IN A MITSUBISHI LANCER ES 2008 I CANT FIND IT AT ALL!!!

It is located in the lower portion of throttle body assembly with the three Philips type screws.
2helpful
2answers

It kills when you remove your foot from the accelator fast

Here are the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

0helpful
1answer

2000 mistubishi galant es idling rough seriously

Idling problems may be cause buy a number of issues.  You may check out the fast idle control valve and PCV if they would need cleaning.  You can check out the timing it may be advanced, that is why you feel that the car runs hard.
1helpful
1answer

FLUCTUATING IDLE ON 2003 LANCER.. ANY IDEA WHY? GOES UP AND DOWN OTHERWIZE RUNS GREAT.

i just fixed mine.. take out your idle air intake valve, clean it all out. mine had the same issue. foreinstance in neutral my rpms were higher then drive. [email protected]
i also have a 2003 lancer black
http://www.cardomain.com/ride/3325170
2helpful
1answer

My 2003 ford focus SE shuts off when i come to a complete stop. It does not have a rough idle and it does not do it everytime.

Here are the most common causes of surges, stalls at stops, low erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake
5helpful
1answer

2003 suburban idles to low.

the idle speed is computer controlled and not adjustable, slow idle is caused by a dirty intake, do the following.

Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

0helpful
2answers

2003 cartier 4.6L 120K miles. Rough idle, at idle only.

has anyone checked for a vacum leak? a vacum leak will cause rough idle at idle. check the lines from the pcv valve.
1helpful
1answer

2003 Ford Taurus wants to die when coming to a stop

TRY THIS AND LET ME KNOW IF IT CORRECTS YOUR PROBLEM
Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake
0helpful
2answers

2003 cartier 4.6L 120K miles. At idle, and idle only, the engine will run a little "rough". When I accelerate, no problems at all. Any ideas?

Try this.
Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake
0helpful
1answer

Low idle

Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
Not finding what you are looking for?

4,109 views

Ask a Question

Usually answered in minutes!

Top Mitsubishi Experts

ZJ Limited
ZJ Limited

Level 3 Expert

17989 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

15088 Answers

john h

Level 3 Expert

29494 Answers

Are you a Mitsubishi Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...